How is fuel consumption measured?

In the US, fuel economy is measured in MPG (miles per gallon) — higher is better. In Europe and most other countries, it's L/100km (liters per 100 kilometers) — lower is better. Our calculator supports both systems. Official EPA ratings often differ from real-world results by 10-20%, so it's best to track your actual consumption over a full tank. Typical US values: sedans 25-35 MPG, SUVs 20-28 MPG, trucks 15-22 MPG. Hybrids can achieve 45-55+ MPG in city driving.

How is EV energy consumption measured?

EV consumption is measured in kWh per 100 miles (kWh/100mi) in the US or kWh per 100 km in Europe. Typical values vary by vehicle size: compact EVs like the Chevy Bolt use 25-30 kWh/100mi, mid-size sedans like the Tesla Model 3 use 26-30 kWh/100mi, and large SUVs like the Tesla Model X or BMW iX use 35-45 kWh/100mi. Lower consumption means lower running costs and more range per charge. Driving style, temperature, and HVAC use can swing consumption by ±20-30%.

What are charging losses?

When charging an EV, some electrical energy is converted to heat rather than stored in the battery — these are called charging losses. Typical losses are: home Level 2 AC charging ~10-15%, public AC stations ~8-12%, DC fast charging ~5-8%. This means charging a 60 kWh battery to full actually draws about 66-69 kWh from the grid. Our calculator lets you factor in these losses for a more accurate cost estimate. Charging in moderate temperatures (60-80°F) minimizes losses.

What's the average gas price in the US?

US gas prices fluctuate significantly but typically range $3.00-4.50 per gallon for regular unleaded, depending on region and market conditions. California and the Northeast tend to be $0.50-1.50 higher than the national average, while states like Texas and Mississippi are often cheapest. Electricity for home EV charging averages $0.12-0.18/kWh, making EVs roughly 3-4x cheaper per mile than gasoline cars. Apps like GasBuddy help find the cheapest stations near you.

Does this calculator compare gas vs electric?

No — this calculator computes the trip cost for one selected fuel type (gasoline, diesel, or electric). To compare the total cost of running a gas car versus an electric vehicle on the same route, use our dedicated "Gas vs Electric" calculator, which factors in fuel prices, electricity rates, maintenance differences, and battery degradation to give you a comprehensive side-by-side comparison.

How can I reduce fuel/electricity costs?

For gas vehicles: maintain a steady speed of 55-65 mph on highways, accelerate smoothly, keep tires properly inflated (underinflation by 3 PSI costs ~1% in MPG), and remove roof racks when not in use (saves up to 15% on highway). For EVs: charge at home during off-peak hours for the cheapest rates, avoid frequent DC fast charging (it costs 2-3x more and degrades the battery faster), use regenerative braking, and pre-condition the cabin while still plugged in. Eco-driving habits can reduce your costs by 15-25% annually.

Does diesel cost less to run than gasoline?

Diesel engines are typically 25-30% more fuel-efficient than gasoline, consuming around 5-7 L/100km (40-47 MPG) vs 7-10 L/100km (24-34 MPG) for gasoline. However, diesel fuel often costs more per gallon. The total cost advantage depends on your annual mileage — diesel pays off best for high-mileage highway drivers.

How much more fuel do I use driving in the city vs on the highway?

City driving typically uses 20-40% more fuel than highway driving. Stop-and-go traffic, frequent braking, and idling all waste fuel. For example, a car rated 30 MPG on the highway might only achieve 20-22 MPG in city traffic. If you do mostly city driving, consider a hybrid — regenerative braking recovers much of that lost energy.

What fuel efficiency tips save the most money?

The biggest savings come from: (1) driving at steady highway speeds — fuel use rises sharply above 65 mph; (2) keeping tires properly inflated (under-inflation cuts MPG by 0.2% per PSI); (3) removing roof racks and cargo boxes when not in use (can add 5-15% drag); (4) avoiding jackrabbit starts. Together these tips can improve efficiency by 15-25%, saving hundreds of dollars per year.

How does carpooling reduce my fuel costs?

Carpooling with just one other person cuts your personal fuel cost in half. For a 30-mile round-trip commute at 30 MPG and $3.50/gallon gas, solo driving costs about $1,277/year. With two riders splitting costs equally, you pay only $638/year — saving $639 annually. With three riders, you pay $426/year. Carpooling also reduces wear and tear on your vehicle.

Is a hybrid worth it to lower fuel costs?

Hybrids typically achieve 40-55 MPG in combined driving vs 25-35 MPG for comparable conventional cars — a savings of 30-40%. At 15,000 miles/year and $3.50/gallon, a hybrid saves $500-900/year on fuel. The premium cost of a hybrid (typically $3,000-5,000 more) usually pays back in 5-8 years. If you do a lot of city driving, the payback is faster since hybrid regenerative braking is most effective in stop-and-go conditions.

How do fuel prices trend over time?

US gas prices have historically risen roughly with inflation over the long term, but with significant short-term volatility. Prices spiked during the 1970s oil crisis, 2008 financial crisis, and 2022 post-pandemic surge. Regional differences are also large — California often pays $1.00-1.50/gallon more than the national average. For budget planning, use the current local price and add a 5-10% buffer for year-to-year variation.

Does seasonal driving affect fuel consumption?

Yes, significantly. Winter fuel economy drops 10-25% for gasoline vehicles due to: cold engine warm-ups (more fuel-rich mixture), thicker motor oil, increased rolling resistance from cold tires, and more electrical load (heating, defrosting). EVs can lose 20-40% range in very cold weather. Summer heat also hurts slightly — air conditioning can reduce MPG by 5-25% depending on how hard it runs.

How can I plan a road trip to minimize fuel costs?

For cost-efficient road trips: (1) use GasBuddy or similar apps to find cheapest stations along your route; (2) fill up in states with lower gas taxes (e.g., Texas vs California); (3) drive at 60-65 mph — fuel use increases roughly 7-14% for every 5 mph over 50 mph; (4) use cruise control on highways to maintain steady speed; (5) pack light — every 100 lbs of extra weight reduces fuel economy by about 1%.

Can I deduct fuel costs on my US tax return?

Yes, in certain cases. If you use your vehicle for business, you can deduct actual fuel costs or use the IRS standard mileage rate (67 cents/mile for 2024). Self-employed individuals can deduct business driving on Schedule C. Employees generally cannot deduct commuting costs, but some can deduct work-related travel. Keep a mileage log — it's the most important document for a fuel tax deduction. Consult a tax professional for your specific situation.

Trip Cost Calculator

✓ Free online calculator · No signup · Instant results

Calculate trip fuel or electricity costs for any vehicle and distance. Compare gas vs electric running costs with our Fuel vs Electric Calculator, or see how energy prices affect your home bills with the Electricity Cost Calculator. For the full cost of owning a car including insurance and depreciation, see the Total Car Cost Calculator.

Enter your vehicle consumption, fuel price, and trip distance to calculate the exact fuel or electricity cost for any journey—in US or metric units.

Last updated: March 2026

How It Works

This calculator supports two drive types and two unit systems:

Gas/Diesel Vehicle

Metric: Fuel = (Distance / 100) × Consumption [L]
Imperial: Fuel = Distance / MPG [gallons]
Cost = Fuel × Price per unit

Electric Vehicle (EV)

Energy Needed = (Distance / 100) × Consumption [kWh]
With Charging Losses: Energy × (1 + Loss%/100)
Cost = Energy × Price per kWh

Cost per distance = Total Cost / Distance

Examples

🇺🇸 US: LA to San Francisco

Distance 380 miles (round trip = 760 mi)

Fuel economy: 30 MPG
Price: $3.50/gal
Fuel needed: 25.3 gal
Cost: $88.67
Cost/mile: $0.12

⚡ EV: Same Trip

Distance 760 miles (round trip)

Consumption: 30 kWh/100mi
Price: $0.15/kWh (home)
Energy needed: 228 kWh
Cost: $34.20
Cost/mile: $0.05

FAQ

How is fuel consumption measured?: In the US, fuel economy is measured in MPG (miles per gallon) — higher is better. In Europe and most other countries, it's L/100km (liters per 100 kilometers) — lower is better. Our calculator supports both systems. Official EPA ratings often differ from real-world results by 10-20%, so it's best to track your actual consumption over a full tank. Typical US values: sedans 25-35 MPG, SUVs 20-28 MPG, trucks 15-22 MPG. Hybrids can achieve 45-55+ MPG in city driving.
How is EV energy consumption measured?: EV consumption is measured in kWh per 100 miles (kWh/100mi) in the US or kWh per 100 km in Europe. Typical values vary by vehicle size: compact EVs like the Chevy Bolt use 25-30 kWh/100mi, mid-size sedans like the Tesla Model 3 use 26-30 kWh/100mi, and large SUVs like the Tesla Model X or BMW iX use 35-45 kWh/100mi. Lower consumption means lower running costs and more range per charge. Driving style, temperature, and HVAC use can swing consumption by ±20-30%.
What are charging losses?: When charging an EV, some electrical energy is converted to heat rather than stored in the battery — these are called charging losses. Typical losses are: home Level 2 AC charging ~10-15%, public AC stations ~8-12%, DC fast charging ~5-8%. This means charging a 60 kWh battery to full actually draws about 66-69 kWh from the grid. Our calculator lets you factor in these losses for a more accurate cost estimate. Charging in moderate temperatures (60-80°F) minimizes losses.
What's the average gas price in the US?: US gas prices fluctuate significantly but typically range $3.00-4.50 per gallon for regular unleaded, depending on region and market conditions. California and the Northeast tend to be $0.50-1.50 higher than the national average, while states like Texas and Mississippi are often cheapest. Electricity for home EV charging averages $0.12-0.18/kWh, making EVs roughly 3-4x cheaper per mile than gasoline cars. Apps like GasBuddy help find the cheapest stations near you.
Does this calculator compare gas vs electric?: No — this calculator computes the trip cost for one selected fuel type (gasoline, diesel, or electric). To compare the total cost of running a gas car versus an electric vehicle on the same route, use our dedicated "Gas vs Electric" calculator, which factors in fuel prices, electricity rates, maintenance differences, and battery degradation to give you a comprehensive side-by-side comparison.
How can I reduce fuel/electricity costs?: For gas vehicles: maintain a steady speed of 55-65 mph on highways, accelerate smoothly, keep tires properly inflated (underinflation by 3 PSI costs ~1% in MPG), and remove roof racks when not in use (saves up to 15% on highway). For EVs: charge at home during off-peak hours for the cheapest rates, avoid frequent DC fast charging (it costs 2-3x more and degrades the battery faster), use regenerative braking, and pre-condition the cabin while still plugged in. Eco-driving habits can reduce your costs by 15-25% annually.
Does diesel cost less to run than gasoline?: Diesel engines are typically 25-30% more fuel-efficient than gasoline, consuming around 5-7 L/100km (40-47 MPG) vs 7-10 L/100km (24-34 MPG) for gasoline. However, diesel fuel often costs more per gallon. The total cost advantage depends on your annual mileage — diesel pays off best for high-mileage highway drivers.
How much more fuel do I use driving in the city vs on the highway?: City driving typically uses 20-40% more fuel than highway driving. Stop-and-go traffic, frequent braking, and idling all waste fuel. For example, a car rated 30 MPG on the highway might only achieve 20-22 MPG in city traffic. If you do mostly city driving, consider a hybrid — regenerative braking recovers much of that lost energy.
What fuel efficiency tips save the most money?: The biggest savings come from: (1) driving at steady highway speeds — fuel use rises sharply above 65 mph; (2) keeping tires properly inflated (under-inflation cuts MPG by 0.2% per PSI); (3) removing roof racks and cargo boxes when not in use (can add 5-15% drag); (4) avoiding jackrabbit starts. Together these tips can improve efficiency by 15-25%, saving hundreds of dollars per year.
How does carpooling reduce my fuel costs?: Carpooling with just one other person cuts your personal fuel cost in half. For a 30-mile round-trip commute at 30 MPG and $3.50/gallon gas, solo driving costs about $1,277/year. With two riders splitting costs equally, you pay only $638/year — saving $639 annually. With three riders, you pay $426/year. Carpooling also reduces wear and tear on your vehicle.
Is a hybrid worth it to lower fuel costs?: Hybrids typically achieve 40-55 MPG in combined driving vs 25-35 MPG for comparable conventional cars — a savings of 30-40%. At 15,000 miles/year and $3.50/gallon, a hybrid saves $500-900/year on fuel. The premium cost of a hybrid (typically $3,000-5,000 more) usually pays back in 5-8 years. If you do a lot of city driving, the payback is faster since hybrid regenerative braking is most effective in stop-and-go conditions.
How do fuel prices trend over time?: US gas prices have historically risen roughly with inflation over the long term, but with significant short-term volatility. Prices spiked during the 1970s oil crisis, 2008 financial crisis, and 2022 post-pandemic surge. Regional differences are also large — California often pays $1.00-1.50/gallon more than the national average. For budget planning, use the current local price and add a 5-10% buffer for year-to-year variation.
Does seasonal driving affect fuel consumption?: Yes, significantly. Winter fuel economy drops 10-25% for gasoline vehicles due to: cold engine warm-ups (more fuel-rich mixture), thicker motor oil, increased rolling resistance from cold tires, and more electrical load (heating, defrosting). EVs can lose 20-40% range in very cold weather. Summer heat also hurts slightly — air conditioning can reduce MPG by 5-25% depending on how hard it runs.
How can I plan a road trip to minimize fuel costs?: For cost-efficient road trips: (1) use GasBuddy or similar apps to find cheapest stations along your route; (2) fill up in states with lower gas taxes (e.g., Texas vs California); (3) drive at 60-65 mph — fuel use increases roughly 7-14% for every 5 mph over 50 mph; (4) use cruise control on highways to maintain steady speed; (5) pack light — every 100 lbs of extra weight reduces fuel economy by about 1%.
Can I deduct fuel costs on my US tax return?: Yes, in certain cases. If you use your vehicle for business, you can deduct actual fuel costs or use the IRS standard mileage rate (67 cents/mile for 2024). Self-employed individuals can deduct business driving on Schedule C. Employees generally cannot deduct commuting costs, but some can deduct work-related travel. Keep a mileage log — it's the most important document for a fuel tax deduction. Consult a tax professional for your specific situation.

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